Pipe-wrench



R. B. SHOOK.

PIPE WRENCH.

APPLICATION FILED DEC-18, 1919. 1 $342,356, Patented Jane 1, 1920.

km N w w 3 f NN 1T; OFFICE.

-R.OY B. sHooK, or DAYTON, OHIO.

' PIPE-WRENCH.

and useful 'a' wrench of uncommon strength and having the structural features hereinafter described and claimed.

Preceding a more particular description of the invention, reference is made in general terms to the accompanying drawings.

In said drawings Figure 1, 1s a slde elevas tion of my improved wrench; Fig. 2 is a bottom plan view of the wrench; Fi 3 is a section on the line 3-3 of Fig. 1; ig. a is a section on the line 4-4, of 1; Fig. 5 is a section on the line 5-5 of ig. 1; ig. 6 is a section on the line 6-6 of Fig.1; Fig. 7 is a section on the line 7-7 of Fig. 1; Fig. 8 is a fragmental section of the adjustable nut and Fig. 9 is a section of a portion of the adjusting nut.

In a more particular description of the invention similar reference characters indicate corresponding parts in the several views.

' The handle -1- of the wrench is detachable from the member -2- to which the fixed jaw -7- of the wrench is secured. It is desirable to have the handle -1- so made detachable in order that diiferent'handles may be substituted to suit different users. The handle shown in the drawing is made of wood, a common material in the construction of tool handles. The said handle -1- has a metal extension -lwhich terminates in an interlocking portion -5- which enters sidewise a groove -6- in the metal interlocking portion -2- of the fixed jaw member 7. When the detachable handle -1- is connected with the fixed jaw member 7, as shown in Fig. l, the sides are inclosed by plates 8-8, which are secured by pins -9- which enter openings 10- in the handle extension and the interlocking portion 2 of the fixed jaw member -7- respectively. The fixed jaw member -7 is recessed on each side as indicated by 11 as shown in Fig. 2, and

p Specification of Letters fatent. .Pafehted J n 1" 1920 Application filed December 18,1919. Serial no. 345,754.

at each end of said recesses, heads 12 and 13 are formed. The, head -12 has inner tapered shoulders ''14 formed thereon, and the head -13- has tapered shoulders -15- formed thereon. The fixed jaw member -7- terminates in the end head -13- to which a toothed plate -3-" is secured by means of ascrew -16-', and a pin -17- which projects from the said plate3-' and enters a cavity in the-head -13- of said fixed'jaw member. The

teeth 'on the plate -3- cooperate with the teeth on the movable jaw member -22-.

The said movable jawmember extends in a horizontal toothed shank -21- which is moved to its adjusted positions by an adjusting nut -25- which receives the toothed shank. The shank -21- is received by the upper opening -20- in a frame 18-,' said frame also having a lower opening -20- which receives the recessed portion of the fixed jaw member -7-.' The threaded portion 21 of the movable jaw memberhaslongitudinal serrations -23 extending through the adjusting threads -24- as shown in Fig. 8 more clearly, and the adjusting nut -25- as shown in Fig. 9 has threads -26- that coiiperate with the threads -21 and serrations -26- that coeperate with the serrations 23-. The purpose of providing the shank -21- and the adjusting nut -25- with the serrations -26- is to prevent the nut from turning too freely on the shank -21- when the wrench is being used.

The sides of the frame -18- lie over the sides of the recessed portion -11 of the fixed jaw member, and said frame -1 8- is pivotally united to said recessed portion by a pivot pin -19-v and abuts with the heads -12 V and -13- on each side of said pivot -19-. The lower sides of the frame -18- are tapered as at -28 and -28'- to adapt them to enter the recesses in the heads -12- and -13 at the ends of the recessed portion of the fixed jaw member faces or parts cause an interlocking between the frame j18' supporting the movable jaw, and the fiXed jaw member which relieves the pivot-19 of strain when the tool is operated.

Beneath the recessed portion -11-- of the fixed jaw member, a plate spring -31' is secured, said plate spring being secured at that the said jaw will not slip while being operated. p

H :As hereinbefore stated, the frame -18- engages with the shoulders 14 on one side of the pivot -19 as shown in Fig. 7 On the other=side of thesaid pivot, the engagement is between the tapered surface Q8" of the frame and the corresponding tapered surface ofthe head 13,. A firm gripping is thus effected between the fixed ,jaw member 7 and the frame -18--,

when the wrench is operated from thehandle -1--.

Having described my invention, 1 claim: A pipe" wrench comprising a fixed jaw member having a portion recessed on opposite sides and heads formed at the terminals of said recessed portion, said heads having inwardly lying recesses, the recesses of one having shoulders formed therein and the recesses of the other being tapered upwardly and outwardly, a frame pivotally united to the recessed portion of said fixed member, and-entering the recesses in the said heads, said frame having shoulders formed on the portions which enter the recesses in one of said heads to abut against the shoulders therein, and said portions of the frame which enter the recesses in the other of said heads being adapted. to interlock therewith, an adjustable jaw member supported in said frame, and an adjusting nut engaging said adjustable jaw member within said frame.

In testimony whereof I aflix my signature.

nor B. sHooK, 

